/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package cn.zch.test.netty.telnet;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;

import java.io.BufferedReader;
import java.io.InputStreamReader;
/**
 * Simplistic telnet client.
 *
 * @author zchcpywin10
 */
public final class TelnetClient {
  static final boolean SSL = System.getProperty("ssl") != null;
  static final String HOST = System.getProperty("host", "192.168.1.141");
  static final int PORT = Integer.parseInt(System.getProperty("port", SSL ? "60006" : "60006"));
  public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
      sslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
    }
    else {
      sslCtx = null;
    }
    EventLoopGroup group = new NioEventLoopGroup();
    try {
      Bootstrap b = new Bootstrap();
      b.group(group).channel(NioSocketChannel.class).handler(new TelnetClientInitializer(sslCtx));
      // Start the connection attempt.
      Channel ch = b.connect(HOST, PORT).sync().channel();
      // Read commands from the stdin.
      ChannelFuture lastWriteFuture = null;
      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
      System.out.println("N3000 –USER \"abc\" –PASSWORD \"123\" –UploadPrivilege \"T2-1#一层A109西侧进门\" –CardNO 9340341");
      for (int i = 0; i < 100; i++) {
        String line = in.readLine();
        if (line == null) {
          break;
        }
        // String line = "N3000 –USER \"abc\" –PASSWORD \"123\" –UploadPrivilege \"T2-1#一层A109西侧进门\" –CardNO 934034"+i;
        // Sends the received line to the server.
        // lastWriteFuture = ch.writeAndFlush(line + "\r\n")
        lastWriteFuture = ch.writeAndFlush(line);
        // If user typed the 'bye' command, wait until the server closes the connection.
        if ("bye".equalsIgnoreCase(line)) {
          ch.closeFuture().sync();
          break;
        }
      }
      // Wait until all messages are flushed before closing the channel.
      if (lastWriteFuture != null) {
        lastWriteFuture.sync();
      }
    }
    finally {
      group.shutdownGracefully();
    }
  }
}
